usr/src/lib/libcmd/common/rmdir.c

   1 /***********************************************************************
   2 *                                                                      *
   3 *               This software is part of the ast package               *
   4 *          Copyright (c) 1992-2010 AT&T Intellectual Property          *
   5 *                      and is licensed under the                       *
   6 *                  Common Public License, Version 1.0                  *
   7 *                    by AT&T Intellectual Property                     *
   8 *                                                                      *
   9 *                A copy of the License is available at                 *
  10 *            http://www.opensource.org/licenses/cpl1.0.txt             *
  11 *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
  12 *                                                                      *
  13 *              Information and Software Systems Research               *
  14 *                            AT&T Research                             *
  15 *                           Florham Park NJ                            *
  16 *                                                                      *
  17 *                 Glenn Fowler <gsf@research.att.com>                  *
  18 *                  David Korn <dgk@research.att.com>                   *
  19 *                                                                      *
  20 ***********************************************************************/
  21 #pragma prototyped
  22 /*
  23  * Glenn Fowler
  24  * AT&T Research
  25  *
  26  * rmdir
  27  */
  28
  29 static const char usage[] =
  30 "[-?\n@(#)$Id: rmdir (AT&T Research) 2006-08-24 $\n]"
  31 USAGE_LICENSE
  32 "[+NAME?rmdir - remove empty directories]"
  33 "[+DESCRIPTION?\brmdir\b deletes each given directory.  The directory "
  34         "must be empty; containing no entries other than \b.\b or \b..\b.  "
  35         "If a directory and a subdirectory of that directory are specified "
  36         "as operands, the subdirectory must be specified before the parent "
  37         "so that the parent directory will be empty when \brmdir\b attempts "
  38         "to remove it.]"
  39 "[e:ignore-fail-on-non-empty?Ignore each non-empty directory failure.]"
  40 "[p:parents?Remove each explicit \adirectory\a argument directory that "
  41         "becomes empty after its child directories are removed.]"
  42 "[s:suppress?Suppress the message printed on the standard error when "
  43         "\b-p\b is in effect.]"
  44 "\n"
  45 "\ndirectory ...\n"
  46 "\n"
  47 "[+EXIT STATUS?]{"
  48         "[+0?All directories deleted successfully.]"
  49         "[+>0?One or more directories could not be deleted.]"
  50 "}"
  51 "[+SEE ALSO?\bmkdir\b(1), \brm\b(1), \brmdir\b(2), \bunlink\b(2)]"
  52 ;
  53
  54 #include <cmd.h>
  55
  56 int
  57 b_rmdir(int argc, char** argv, void* context)
  58 {
  59         register char*  dir;
  60         register char*  end;
  61         register int    n;
  62         int             eflag = 0;
  63         int             pflag = 0;
  64         int             sflag = 0;
  65
  66         cmdinit(argc, argv, context, ERROR_CATALOG, 0);
  67         while (n = optget(argv, usage)) switch (n)
  68         {
  69         case 'e':
  70                 eflag = 1;
  71                 break;
  72         case 'p':
  73                 pflag = 1;
  74                 break;
  75         case 's':
  76                 sflag = 1;
  77                 break;
  78         case ':':
  79                 error(2, "%s", opt_info.arg);
  80                 break;
  81         case '?':
  82                 error(ERROR_usage(2), "%s", opt_info.arg);
  83                 break;
  84         }
  85         argv += opt_info.index;
  86         if (error_info.errors || !*argv)
  87                 error(ERROR_usage(2), "%s", optusage(NiL));
  88         if (!pflag)
  89                 sflag = 0;
  90         while (dir = *argv++)
  91         {
  92                 end = dir;
  93                 if (pflag) end += strlen(dir);
  94                 n = 0;
  95                 for (;;)
  96                 {
  97                         if (rmdir(dir) < 0)
  98                         {
  99                                 if (!eflag || errno != EEXIST
 100 #ifdef ENOTEMPTY
 101                                     && errno != ENOTEMPTY
 102 #endif
 103                                     )
 104                                 {
 105                                         if (sflag)
 106                                                 error_info.errors++;
 107                                         else
 108                                                 error(ERROR_system(0), "%s: cannot remove", dir);
 109                                 }
 110                                 break;
 111                         }
 112                         if (n) *end = '/';
 113                         else n = 1;
 114                         do if (end <= dir) goto next; while (*--end != '/');
 115                         do if (end <= dir) goto next; while (*(end - 1) == '/' && end--);
 116                         *end = 0;
 117                 }
 118         next:   ;
 119         }
 120         return(error_info.errors != 0);
 121 }
 122